php hetting .ods文件而不是xsl文件下载

Question

我有用于生成xsl文件的代码。

           <?php
$today = date('m/d/Y');

include('config-db.php');

$sql = "SELECT * FROM employees";

$result = mysqli_query($conn, $sql);

if (mysqli_num_rows($result) > 0) {

    $filename = "report.xls";

    header("Content-Type: application/vnd.ms-excel");

    header("Content-Disposition: attachment; filename=\"$filename\"");

    $isPrintHeader = false;

    // output data of each row

    while ($row = mysqli_fetch_assoc($result)) {

        $sql1    = "SELECT * FROM records  WHERE employees_id =" . $row['id'];
        $result1 = mysqli_query($conn, $sql1);

        while ($row1 = mysqli_fetch_assoc($result1)) {

            echo "Fecha";
            echo "\t" . "Name";
            echo "\t" . "In";
            echo "\t" . "Break";
            echo "\t" . "Break end";
            echo "\t" . "Exit";
            echo "\t" . "Others" . "\n";

            echo "" . $row1["day"];


            echo "\t" . $row["name"] + $row["apellido"];



            echo "\t" . $row1["in"];

            echo "\t" . $row1["break"];

            echo "\t" . $row1["breakend"];

            echo "\t" . $row1["exit"];

            echo "\t" . $row1["others"];

        }

    }

}
mysqli_close($conn);

一切正常，但是当我将代码放入生产服务器时，即使我在代码上指定了文件格式，它也会给我一个.ods文件而不是xsl。

会发生什么？，一个朋友告诉我，这是因为服务器在Linux上运行，所以有没有办法强迫Linux创建xsl？